SQL Server Analysis Services - Data Mining

The Data Mining Designer, which you can use to create, manage, and explore data mining models, and then create predictions by using those models.

The Data Mining Extensions (DMX) language, which you can use to manage mining models and to create complex prediction queries.

You can use a combination of these features and tools to discover trends and patterns that exist in your data, and then use the trends and patterns to make intelligent decisions about difficult business problems.